<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="../js/demo01.js"></script>
    <style>
        #num{
            font-size: 150px;
        }
    </style>
</head>
<body>
    <font id="num">1</font><br>
    <button onclick="start()">开始</button>
    <button onclick="stopScroll()">停止</button>
</body>
</html>